On Fri, Feb 06, 2015 at 11:10:06AM +0100, Sascha Hauer wrote: > 1) Put it into the RTC device driver. > 2) Put it into the .resource field of struct mfd_cell > 3) Put it into the device tree using standard reg, interrupt properties and > a) Let the RTC driver interpret these > b) Let the MFD driver create resources in the .resource field of struct > mfd_cell > c) Let the MFD core create the resources
> I have a tendency to 3, but I'm afraid that the resource informations > are duplicated too much in the device tree source files, because every > user would have to carry a full description of the mfd device. Maybe > that duplication could be reduced with some CPP magic, I don't know. > Maybe this is a solved problem and I'm just not picking a good example > from drivers/mfd. The wm831x drivers take option 2 but are pre-DT, it still seems the most sensible thing to me though - no need for the user to have to repeat this information in every DT and easy to add new stuff if we need it. You could use a .dtsi like we use for SoCs to reduce the duplication required if you do decide to put things in the DT.
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